<!DOCTYPE html>
<html>
<head>
  <title>Bootstrap 实例 - 下拉菜单（Dropdowns）</title>
  <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
  <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
  <script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
</head>
<body>

<div class="dropdown">

  <button type="button" class="btn dropdown-toggle" id="dropdownMenu1" data-toggle="dropdown">
    主题
    <span class="caret"></span>
  </button>

  <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1">
    <li role="presentation"><a role="menuitem" tabindex="-1" href="#">Java</a></li>
    <li role="presentation"><a role="menuitem" tabindex="-1" href="#">数据挖掘</a></li>
    <li role="presentation"><a role="menuitem" tabindex="-1" href="#"> 数据通信/网络 </a></li>
    <li role="presentation" class="divider"></li>
    <li role="presentation"><a role="menuitem" tabindex="-1" href="#">分离的链接</a></li>
  </ul>
</div>


</body>
</html>
			